Yamanashi Weather & Climate: Best Time to Visit

The climate in Yamanashi is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 27°C (81°F) in August, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like January.

At night, you can expect temperatures ranging from 19°C (66°F) in August to around -6°C (21°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Yamanashi has a notably wet climate with abundant precipitation, recording 1856 mm (73 in) of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 238 mm (9.4 in) of precipitation, recorded across 19 rainy days. In contrast, the driest month December brings less snow/rainfall, with 67 mm (2.6 in) over 10 snowy/rainy days. For more details, please visit our Yamanashi Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

While the amount of sunshine in Yamanashi varies throughout the year, all seasons offer their own charm. Enjoy up to 6.7 hours of daily sun in August, and experience slightly darker atmosphere in June, with about 5.0 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Yamanashi.

The city experiences its highest humidity in July, reaching 74%. In March, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year